[ Didier Roche ]
* Request shutdown and reboot without using gnome-session (LP: #1766811)
The if gnome_session code path doesn't declare the GNOME
session interface it's using, so don't work.
Even fixing it, we notice that calls aren't wired in GNOME session code.
Fallback thus for now to old code path which is executed at least
since xenial (when DBUS address wasn't correct in ubiquity process)

[ Iain Lane ]
* The dbus import is now unused and is triggering a pyflakes error, but
we're not sure it isn't initialising some state that's required. At this
late stage, just silence the error.
* Automatic update of included source packages: flash-kernel
3.90ubuntu2.